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6
LABORATORY
GRADE INSTRUMENTS
THRULINE
®
High-Accuracy RF Power Meter
Our Model 4421 power meter is an excellent choice for demanding calibration,
process control and scientific applications. It directly measures power with an
accuracy of
±
3% of reading without calibration charts, couplers, attenuators, or
other external equipment which can degrade accuracy.
The backlit 3
1
⁄
2
-digit LCD displays forward and reflected power in either watts
or dBm, VSWR, return loss in dBm and Minimum or Maximum values. Ranging is
selectable manual or autoranging. An optional GPIB or RS-232 computer interface
can be used with the Model 4421 during AC operation.
Smart Power Sensors (see below) are required for operation. Each covers an extended
frequency and power range. The microprocessor based sensors contain nonvolatile
memory to store calibration data, and can easily be recalibrated in the field.
Power Range: 100 mW to 10 kW FS
Frequency Range: 100 kHz to 2.5 GHz
VSWR Range: 1.0 – 199.9
Functions: Forward and reflected power in
W or dBm, VSWR, return loss in dB and
min/max values
Ranging: Selectable manual or autoranging.
Power sensor dependent.
Overrange Indication: Audible warning when
RF power input exceeds 120% of
sensor’s maximum power range.
Display: 3
1
⁄
2
digit-liquid crystal display with
annunciator for mode, measurement units,
battery condition, programming status,
and trend arrows. Switchable backlight.
MULTIFUNCTION POWER METER MODEL 4421
Operating Power: AC mains or batteries.
115/230 Vac, 50/60 Hz or 8 nickel cadmium
1.2 V C cells (NEDA type 10014).
Nominal Size: 12
9
⁄
32
" L
×
12
5
⁄
32
" W
×
4
1
⁄
4
" H
(312 mm x 309 mm
×
108 mm) with handle
extended 15
7
⁄
16
"L (392 mm)
Weight: 11 lbs. (5 kg.)
Interconnects: 1 meter latch-n-lok coiled cable.
Interfaces: Optional field-installable
IEEE-488 (PN: 4421-488) or RS-232 serial
interface (PN: 4421-232).
Dimensions: 4
1
⁄
2
"
×
6
1
⁄
2
" (114
×
165 mm)
Required Product: Order a Smart RF Power
Sensor below
Recommended Accessories: Case (page 7)
Circuitry: Microprocessor-based measurement
and conversion.
Frequency/Power Coverage: Single power
sensor covers specified power and
frequency range.
Bi-directional Operation: Pick up of RF power
in precision 50-ohm line.
Accuracy:
±
3% of reading from rated
maximum range down to 30% of
full scale on the most sensitive range.
Signal Purity: For rated accuracy, no more than
1% AM; harmonics –50 dB or less.
Calibration Technique: Calibration vs frequency
curve stored in nonvolatile memory within
each sensor. Sensor output corrected at fre-
quency of measurement within rated stage.
SMART POWER SENSORS 4020 SERIES
Sampling Rate: Approximately 2 readings/second.
Ambient Temperature Range: Temperature
compensated for rated accuracy from
0˚C to 50˚C (32˚F to 122˚F).
Connectors: QC-type. Female N normally
supplied; Other coaxial-type connectors
available on page 60.
Nominal Size: (includes connectors)
5
7
⁄
32
" L
×
2
1
⁄
2
" W
×
3
1
⁄
4
" H
(132.5 mm
×
64 mm
×
83 mm).
Weight: 1 lb. 11 oz. (0.76 kg).
MODEL
POWER FREQUENCY VSWR MINIMUM INSERTION
INPUT RANGE RANGE DIRECTIVITY LOSS (DB)
4021 300 mW – 1000 W 1.8 MHz – 32 MHz 1.0 – 2.0 28 <0.05
(1200 W max.)
4022 300 mW – 1000 W 25 MHz – 1000 MHz 1.0 – 2.0 28 25 – 512 MHz: <0.05
(1200 W max.) 512 – 1000 MHz: <0.13
4023 100mW – 200W 900 MHz – 2500 MHz 1.0 – 3.0 20 <0.2
(240 W max.)
4024 3 W – 10 kW 1.5 MHz – 32 MHz 1.0 – 2.0 28 <0.05
(12 kW max.)
4025 3 W – 10 kW 100 kHz – 2500 kHz 1.0 – 2.0 28 <0.05
(12 kW max.)
(13 pages)
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